nvme on raspberry pi 5

• Useful links to look at:
  • NVMe SSD boot docs in RPi docs
  • BOOT_ORDER docs in RPi docs
• rpi5-eeprom package on Arch Linux ARM brings the relevant eeprom tools.
  • Recommended BOOT_ORDER: BOOT_ORDER=0xf416 (retry - USB - SD - NVMe, this allows for easier debugging if smth goes wrong, though you’ll want to physically remove the SD after setting up NVMe)
    • you can set this with `sudo -E rpi-eeprom-config —edit
• I formatted the NVMe as described in ALARM install guide from ALARM itself
  • You’ll need dosfstools along the way.
• I mounted the partitions to /tmp/boot and /tmp/root.
  • rsync -azrP /boot /tmp/
  • rsync --delete -azrP -x / /tmp/root/
• Edit /tmp/root/etc/fstab and /tmp/boot/cmdline.txt to point to NVMe instead.
  • Former: Change /dev/mmcblk0p1 to /dev/nvme0n1p1
  • Latter: Change /dev/mmcblk0p2 to /dev/nvme0n1p2
• Add dtparam=pciex1 and optionally dtparam=pciex1_gen=3 to /tmp/boot/config.txt.
• Shutdown, remove SD card, power back on & pray.